Home / 420,117.42-579,811.86-238,856.70

Finding the Fourth Proportional to 420,117.42, 579,811.86 and 238,856.70

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Solution

The fourth proportional to 420,117.42, 579,811.86 and 238,856.70 is: 329,650.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,117.42 : 579,811.86 = 238,856.70 : x
  2. Step 2: Convert to fraction form
    420,117.42/579,811.86 = 238,856.70/x
  3. Step 3: Cross multiply
    420,117.42x = 579,811.86 × 238,856.70
  4. Step 4: Simplify right side
    420,117.42x = 138,491,947,500.46
  5. Step 5: Solve for x
    x = 138,491,947,500.46/420,117.42
  6. Step 6: Final answer
    x = 329,650.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.